Internal combustion engine



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INTERNAL COMBUSTION ENGINE Filed Nov. 33, 1958 4,Sheets-Sheet 1 Inventor Blaine W Br n y 1 May 7, 1940.

INTERNAL CDRBUSTI 0N ENGINE Filed Nov. 8, 1938 4 Sheds-Sheet 2 I m IInventor Blaine WBraw/wle, I o By 5 May 7, 1940.

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INTERNAL COMBUSTION ENGINE 4 Sheets-Sheet 3 Filed NOV. 8, 1938 InventorI Bid/Z w e Wfirwgxoigj:

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. 1mm colmus'non ENGINE V 7 Filed Nov. 3; 193a 4 Shots-Sheet 4 eWBrwqfmiq Inventor a Patented May 7, 1940 UNITED. STATES PATENT OFFICE j1 INTERNAL COMBUSTION ENGINE Blaine W. Bradfute, Jr., Bloomington, Ind.Application November 8; 1938, Serial No. 239,576 v 1 Claim. (01. 123-56)This invention appertains to new and useful improvements in internalcombustion engines and more particularly to an engine constructed insuch a manner to eliminate a number of the parts of the present-daytypes of engines, thus reducing the cost and operating expenses.

An important object of the present invention is to provide an engine ofthe aligned cylinders type wherein the pistons are associated and conl0structed in such a manner as to eliminate connecting rods.

Another important object of the invention is to provide an engine of thecharacter stated which will be smooth-running and not susceptible to theready development of defects.

These and various other important objects and advantages of theinvention will become apparent to the reader of the followingspecification.

In the drawings:

Figure 1 represents a side elevational view of the engine. I

Figure 2 is a longitudinal sectional view on line 2-2 of Figure 1.

Figure 3 is a longitudinal vertical sectional view taken substantiallyon line 3-3 of Figure 2.

Figure 4 is' an end elevational view.

Figure 5 is a perspective view of one of the eccentric riders.

Figure 6 is a fragmentary detail sectional view showing one of thepintles.

Figure 7 is a side elevational view of one of the gears.

Figure 8 is a sectional view taken substantially on line 88 of Figure 2showing only the eccentric.

Figure 9 is a fragmentary top plan view of the eccentric.

Figure 10 is a top plan view of the pistons as sembly.

Figure 11 is a sectional view taken substan tially on line of Figure 10.

Referring to the drawings wherein like numerals designate like parts, itcan be seen that the invention includes the two aligned cylinders 5 and6 each provided with heat-dissipating fins 1. The outer end of each ofthese cylinders 5-6 is provided with an intake shell construction 8 andan exhaust shell structure 9, each of which has a valve stem I0apertured therethrough and with one stem equipped with the inlet valveand the other with the exhaust valve l2. These stems are provided withrockers |3 for operating the same, the rockers of the valves beingoperated by the rods l4, while the rockers of the valves |2 are operatedby the rods l5.

As shown in Figure l, the eccentric oil case consists of the pair ofsemi-cylindrical sections l6 and I1 flanged and bolted together as at l8and as can be further seen, the inner ends of the aforementionedcylinders 5 and 6 are secured by 5 screws I9 to the case sections l6 andI1.

Numeral 20 represents the drive shaft (see Figure 2) which has the camdisk 2| thereon operating within the confines of the pistons assemblygenerally referred to by numeral 22. This 10 assembly consists of thetwo aligned piston heads 2324, each having its skirt portion 25, andthese skirt portions are provided with tubular extensions 26-46 slottedas at 21 and 28 so that when they are joined together as shown in Fig-16 ure 10 elongated slots are formed through which the eccentric canoperate and also through which the drive shaft 20 can operate.

As can be seen in Figure 11, the adjacent end portions of the extensions26 are reduced and 20 interlapped as at 29 and in this interlappingposition secured together by screws 30.

The pistons 23 and 24 are placed within the cylinders 5 and 6respectively, and inside of each of the pistons 23 and 24 is adiametrically dis- 25 posed bridge 3| which is channeled to form thepocket 32 for receiving the grooved block or rider 33, in the groove aof which rides the ring 34, which ring is formed with a transverselyconvex peripheral surface for even riding engagement 30 in the grooves aof the said blocks or riders 33. As shown the groove a in each block orrider 33 is of substantially trough shape in cross section, the walls ofwhich conform tothe convex peripheral surface of the ring or eccentricstrap 5 34.

The peripheral portion of the eccentric disk 2| is formed with thecircumferentially extending channel 35 (see Figure 9) for receiving theroller bearings 36 thus affording anti-frictional means m betweenthedisk 2| and the annulus 34.

'As can be clearly seen in Figures 2 and 3, the backside of; theriders.33 are each provided with a pair of threaded members 31 fordisposition through openings in the corresponding bridge 3|. 45 Thethreaded members are provided with nuts 38 to prevent displacement ofthe riders. I

At each side of the engine construction is a casting 39 which has abearing construction 40 at its intermediate portion through which the 50reduced portion 4| of the drive shaft 2|! extends. The casting 39 isprovided with side walls 42 through which the pitmans 43 are operative,these pitmans 43 being connected to'the corresponding rods l4 and I5. 55

.mesh with the pinion 46 carried by the corresponding reduced portion 4|of the drive shaft 20. These gears 45'carry cams 41 which ride againstthe corresponding ends of the pitmans 43 to result in the operation ofthe same.

As can be seen, each cylinder is equipped with a spark plug 48.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention .what is claimed as new is:

An engine comprising a pair'of aligned cylinders, a pair or pistons inthe cylinders, meals I for connecting together the inner ends of thepistons, a shaft passing between the inner ends oi! the pistons, aneccentric on the shaft, an eccentric strap surrounding the eccentric, atransverse member extending across each pistonadjacent its inner end andhaving a channel in that part which is adjacent the eccentric strap,said channel extending transversely, a block of elongated form fittingin each channel and having a iongitudinally extending groove in itsouter edge,

said groove being of substantially trough-shape in cross section toprovide arcuate walls and the outer circumference of the strap being ofarm-- ate shape in cross section to engage the arcuate' BLAINE w.BRADFUTE, Jn.

